Aron said he “panicked” and dismembered the boy’s body, according to authorities.

He was busted after leading them to other parts of Leiby’s body, stuffed in a red suitcase and hidden in a Dumpster outside an auto repair shop about two miles away, NYPD Commissioner Ray Kelly said during a news conference this morning.

“This is every parent’s nightmare,” said Kelly. “We understand that. This is what makes this case so horrific.”

At the same time, investigators are looking into a recent account where Aron may have approached another boy and tried to lure him inside his car.